[Task] SAMM2AAS: support MultiLanguageProperty

[BirgitBoss]

Is your task related to a problem? Please describe.
In
eclipse-esmf/esmf-semantic-aspect-meta-model#134
there is the request to predefine a characteristic or entity for MultiLanguageProperties of the Asset AdministrationShell. There already is a proposal how it should look like

:MultiLanguageSet a bamm-c:Set ;
   bamm:elementCharacteristic bamm-c:MultiLanguageText  .

However, the current converter from AAS to SAMM converts a bamm-c:Set into a SubmodelElementList. This set would be an exception from this rule. It shall be mappend to a MLP (MultiLanaugeProperty) element in AAS.

Describe the solution you'd like

• predefined elements for Multi Language Properties as prerequisite
• to be able to correctly convert SAMM to AAS

[andreas-schilling]

This has been adressed with #598 and release 2.9.0. Can you please re-check?